Diff: Semihost.cpp

Revision:

4:5e4107edcbdb

Parent:

3:d7a7cde0bfb8

Child:

9:7e71c20c96e4

--- a/Semihost.cpp	Sun Sep 08 14:13:15 2013 +0000
+++ b/Semihost.cpp	Wed Sep 11 14:00:40 2013 +0000
@@ -1,4 +1,4 @@
-// Semihost.cpp 2013/9/8
+// Semihost.cpp 2013/9/10
 #include "Semihost.h"
 #include "mydebug.h"
 
@@ -36,35 +36,31 @@
 
 int Semihost::exec(uint32_t reason, uint32_t arg)
 {
-    int result = 0;
     switch(reason) {
-        case 0x01: result = sys_open(arg); break;
-        case 0x02: result = sys_close(arg); break;
-        case 0x03: result = sys_writec(arg); break;
-        case 0x04: result = sys_write0(arg); break;
-        case 0x05: result = sys_write(arg); break;
-        case 0x06: result = sys_read(arg); break;
-        case 0x07: result = sys_readc(arg); break;
-        case 0x09: result = sys_istty(arg); break;
-        case 0x0a: result = sys_fseek(arg); break;
-        case 0x0b: result = sys_ensure(arg); break;
-        case 0x0c: result = sys_flen(arg); break;
-        case 0x0e: result = sys_remove(arg); break;
-        case 0x0f: result = sys_rename(arg); break;
-        case 0x18: result = sys_exit(arg); break;
+        case 0x01: return sys_open(arg);
+        case 0x02: return sys_close(arg);
+        case 0x03: return sys_writec(arg);
+        case 0x04: return sys_write0(arg);
+        case 0x05: return sys_write(arg);
+        case 0x06: return sys_read(arg);
+        case 0x07: return sys_readc(arg);
+        case 0x09: return sys_istty(arg);
+        case 0x0a: return sys_fseek(arg);
+        case 0x0b: return sys_ensure(arg);
+        case 0x0c: return sys_flen(arg);
+        case 0x0e: return sys_remove(arg);
+        case 0x0f: return sys_rename(arg);
+        case 0x18: return sys_exit(arg);
         
-        case 0x100: result = usr_xffind(arg); break;
-        case 0x101: result = usr_uid(arg); break;
-        case 0x102: result = usr_reset(arg); break;
-        case 0x103: result = usr_vbus(arg); break;
-        case 0x104: result = usr_powerdown(arg); break;
-        case 0x105: result = usr_disabledebug(arg); break;
-
-        default:
-            _pc->printf("[semihost]error reason=%08x arg=%08x\n", reason, arg);
-            result = -1;
+        case 0x100: return usr_xffind(arg);
+        case 0x101: return usr_uid(arg);
+        case 0x102: return usr_reset(arg);
+        case 0x103: return usr_vbus(arg);
+        case 0x104: return usr_powerdown(arg);
+        case 0x105: return usr_disabledebug(arg);
     }
-    return result;
+    _pc->printf("[semihost]error reason=%08x arg=%08x\n", reason, arg);
+    return -1;
 }
 
 int Semihost::sys_open(uint32_t arg) // 0x01